Ringer for telephones and the like.



No. 809,060. v PATENTED JAN. 2, 1906.

. E. E. H'oEEs. EINGEE EOE TELEPHONES AND THE LIKE.

APPLICATION FILED NOV. 10.1904.

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H lim Sym f@ ATTORNEYS UNITED STATES PATENT OFFIOE.

RINGER FOR TELEPHONES AND THE LIKE.

To a/ZZ whom, it may concern:

Be it known that I, ELBERT RADOLPH HOBBS, a citizen of the United States, and a resident of Lamar, in the county of Prowers and State of Colorado, have invented a new and Improved Ringer for Telephones and the Like, of which the following is a full, clear, and exact description.

My invention relates to electric ringers, and admits of general use, but is of peculiar value on telephone-lines.

The purpose of my improvement is to produce a more eiiicient type of ringer provided,

with various adjustments and admitting oi a number of distinct uses.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding partsinall the igures.

Figure 1 is a front elevation of my improved ringer. Fig. 2 is a side elevation of the same viewed as from the left of Fig. 1. Fig. 3l is a horizontal section upon the line 3 3 of Fig. 1 looking in the direction of the arrow and showing certain parts in plan. Fig. 4 is a' perspective view ofthe armature and a part of the means for suspending the same, and Fig. 5 is a perspective' view of the L-shaped plate upon which certain adjusting mechanisms are mounted.

The electromagnet is shown at 6, the permanent or polarizing magnet at 7, the bellstems at 8, and the twin bells at 9.- The clapper is shown at 10 and the armature of the, magnet at 11. This armature is 'provided with trunnions 12 integral therewith and with brackets 13, oppositely mounted upon the trunnions. These brackets are engaged by pendent leaf-springs 14, secured to the brackets 13 by means of screws 15. A yoke 16 is integrally provided with a head 17 and with brackets 18 19, which engage the upper ends of the springs 14 and are secured to these springs by means of screws 20 21. Two iiat members 22 23 are integrally connected together and constitute an L-shaped supporting-plate. (Shown to better advantage in Fig. 5.) The holes 24 in the member 23 are threaded, and fitted into them are the magnetic cores 25. A vertical \slot 26 and two arcuate slots 27 28 are provided in the member 22. A screw 29, passing through the slot 27 and a slot 30 in the head 17 and provided with a nut 31, is used for adjusting the head 17 relatively to the supportingplate. Another screw 32 passes through the Specification of Letters Patent.

Application filed November 10, 1904. Serial No. 232,117.

Patented Jan. 2, 1906.

, if slot 28 and is mounted upon a radially-movable arm 33, which, by means of a pivot 34,

Vis mounted upon the L-shaped supportingplate. This arm 33 is provided with a slot 35, extending in the general direction of the arm, and passing through this slot and through the slot 26 is a pivot 36. An ear 37 is integrally mounted upon the portion 22 of the said L-shaped plate and is engaged by an adjusting-screw 38, which lodges against a boss 39, integral with Athe head 17. The member 23 of the supporting-plate is cut away at 40, as shown in Figs. 3 and 5.

The action of my device is as follows: The tension of the springs 14 tends to hold the armature 11 in such position that its ends will be equidistant Jfrom the magnetic cores 25. Any sticking of the armature relatively to the magnetic cores is thus prevented, and any residual magnetism which may iniiuence either magnetic core is thus prevented from holding the clapper 10 in such position as to stick to either of the twin bells. It will be understood, of course, that in most ordinary ringers the clapper is liable to stick, so that sometimes an impulse fails to cause the bell to work. By my arrangement the clapper is always held in a neutral position and is free to move in either direction, according to the polarity of the magnet 6. Ii now it be desired to move the armature 11 nearer to the magnetic core, the screws 29 and 32 are loosened, the arm 33 is slightly raised, and the screws are tightened. This angular movement of the arm 33 raises the pivot 36 and causes the head 17, carrying with it the yoke 16, to be raised slightly, so that the armature is now a little nearer the magnetic cores. In doing this neither pole of the armature is drawn nearer to its appropriate core than is'the case with the opposite pole. If, however, it be desired to operate the device as a biased ringer, this is accomplished by adjusting the head 17 by means of the arcuate slot 27. The head 17 is swung upon IOO the pivot-pin 36, which is the center of the the free end of the armature 11 is brought intoclose proximity with the neighboring IIO magnetic core 25, so that the armature 11 can be given, a slight inclination in either direction. This adjustment, as will be observed, is independent of the vertical adjustment of the armature. Y

By` various combinations of the two adjustments above described the armature 1l can be made to assume an indefinite variety of positions relative to the magnet, and therefore serves to greatly increase the utility of the ringer when employed in various kinds of telephony and for purposes independent thereof.

It will be noted that in adjusting the armature relatively to the electromagnetic cores 25 it is also necessarily adjusted relatively to the permanent or polarizing magnet 7.

While I show a pair of twin bells actuated bya clapper, I do not limit myself to this particular acoustic mechanism, for obviously the rocking of the armature may be made to sound an alarm in many other ways.

Having thus described my invention, I claim as new and desire to secure by Letters Patentets and depending therefrom, an armature mounted u on said springs and free to rock by the resi ience thereof, and means for adjusting the position of said brackets relatively to said supporting-plate.

j 3. The combination of amagnet, a supporting-plate disposed adjacent thereto and proi ture, and bells to be struck by said clapper.

vided with a slot, a yoke provided With a portion disposed adjacent to said supportingplate and provided with a fastening member extending through said slot for the purpose ofenabling said portion to be adjusted to different angles relatively to said supportingplates, springs connected with said yoke and depending therefrom, an armature mounted upon said springs and free to vibrate by the resilience thereof, a clapper mounted upon said armature and adapted to be actuated thereby, and a bell to be struck by said armature.

4. The combination of amagnet, a supporting-plate disposed adjacent thereto, a yoke provided with a head disposed adjacent to said supporting-plate, means for adjusting said head relatively to said supporting-plate, brackets mounted upon said head and' upon 65 said yoke respectively, springs adjustably mounted within said brackets and depending therefrom, an armature mounted upon said springs, a clapper supported by said arma- 5. rIhe combination of amagnet, a supporting-plate disposed adjacent thereto, an arm mounted upon said supporting-plate and provided with a slot, a yoke supported by said supporting-plate and provided with a head, a member mounted upon said head and projecting through said slot in said arm, means for moving said arm into different radial positions for the purpose of adjusting said head relatively to said supporting-plate, springs 8o connected with said head and with said yoke, an armature mounted upon said springs, a clapper connected with said armature and actuated by movements thereof, and bells to be struck by said clapper.

VIn testimony whereof I have signed my name to this specification in the presence o f two subscribing witnesses.

l ELBERT RADOLPH I-IOBBS.

Witnesses C. B. TrroMAN, J. B. TRAXLER. 

